How many embryos should be transferred?

The number of embryos that should be transferred during any single IVF cycle is open to debate. It has been said in the medical literature that transferring no more than four embryos per IVF cycle will yield optimal results. Transferring more than four is believed to result in excess numbers of multiple pregnancies, which increases the possibility of other complications. Transferring four embryos versus one or two increases the probability that pregnancy will occur, but it is important to realize that all four embryos could implant. The next step is just watching for the signs and symptoms of pregnancy.